However, for those between 18 and 59 years of age (Can. 1252), they are bound to fast on Ash Wednesday. On this day one normal-sized meal and two smaller meals that do not equal the normal meal are allowed. Eating between meals, however, is prohibited although fruit juices and milk are allowed.
These rules are much more lenient than centuries past. If you can, truly make your fasting a sacrifice.
Mass is not required today, but I hope that many of you will go to receive your ashes. For information on the origin of ashs and Ash Wednesday, see this link.